Lifecycle Information Systems: the concept, principles and an approach

The aim of this article is to introduce the concept of lifecycle information systems (LCISs), in which the main purpose is to permit the development of ISs capable of supporting the management of information of an entity during its whole lifecycle. In order to validate this concept, we outline the MyHistory which consists in an experimental IS structured in four different contexts, supporting the information management of persons during their lifecycle. As the main contribution, this article introduces a new approach for the development of ISs which can improve the current way of information management of entities

Search for dark matter produced in association with bottom or top quarks in √s = 13 TeV pp collisions with the ATLAS detector

A search for weakly interacting massive particle dark matter produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and miss- ing transverse momentum are considered. The analysis uses 36.1 fb−1 of proton–proton collision data recorded by the ATLAS experiment at √s = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are in- terpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour- neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark-matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross- section of 300 times the predicted rate for mediators with masses between 10 and 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour- charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements

Lifecycle Information Systems : the concept, principles and an approach.

The aim of this article is to introduce the concept of lifecycle information systems (LCISs), in which the main purpose is to permit the development of ISs capable of supporting the management of information of an entity during its whole lifecycle. In order to validate this concept, we outline the MyHistory which consists in an experimental IS structured in four different contexts, supporting the information management of persons during their lifecycle. As the main contribution, this article introduces a new approach for the development of ISs which can improve the current way of information management of entities

Proposal of a construct for information management in the agent life-cycle.

Atualmente as infroma??es geradas por um agente (ex. uma pessoa; um autom?vel; uma obra p?blica, etc.) ao longo do seu ciclo de vida encontram-se espalhadas por diferentes sistemas de informa??o (SIs) de diferentes organiza??es. Por exemplo, um cidad?o ao longo de sua vida gera informa??es nos mais variados tipos de organiza??o (ex. hospitais, escolas, empresas, reparti??es p?blicas, etc.). Todavia, estas informa??es contidas nos SIs destas organiza??es n?o podem ser livremente acessadas por este cidad?o. Contudo, frente ao atual desenvolvimento tecnol?gico ? poss?vel desenvolver SIs capazes de centralizar em um ?nico resposit?rio as informa??es geradas por um agente ao longo do seu ciclo de vida, constru??o essa ainda pouco observada em nossa sociedade. Em face desta oportunidade de pesquisa neste artigo ? proposto um construto para gest?o da informa??o no ciclo de vida dos agentes (GICVA). Tendo em vista seu car?ter aplicado ? utilizado o m?todo Design Science Research (DSR). Em seguida, este construto ? demonstrado por meio de um SI para gest?o de informa??es de pessoas em dois contextos. Da perspectiva conceitual este artigo apresenta um novo construto que permitir? desenvolver SIs sob um novo paradigma. Da perspectiva da aplica??o, SIs baseados nos princ?pios da GICVA poder?o ser implementados para gerenciar informa??es de diferentes tipos de agentes, tais como pessoas, autom?veis, im?veis, projetos, dentre outros, podendo trazer grandes benef?cios para a sociedade.Currently, information generated by an agent (e.g., a person; a vehicle; a public project, etc.) across its life cycle is scattered in different information systems (ISs) of different organizations. For instance, a citizen during his life generates information in various kinds of organizations (e.g., hospitals, schools, firms, public bureaus, etc.). However, the information inserted in the ISs of these organizations cannot be freely accessed by this citizen. Nevertheless, referring to the current technological development, it is possible to develop ISs capable of centralizing in a unique repository the information of different kinds of agents, across their lifecycle. Owing to this opportunity of research in this article is introduced a construct for information management in the agent lifecycle (IMALC). Considering its applied character, it is used the Design Science Research (DSR) method. This construct is also demonstrated through an application for information management of persons, in two contexts of day-to-day life. From the conceptual perspective, this article presents a new construct for the development of ISs, under a new information management paradigm. From the applied research viewpoint, ISs which incorporate the IMALC principles can be applied to the management of information of different types of agents, such as, persons, automobiles, buildings, projects, and so on, bringing great benefits for the society

Searches for the ZγZ\gamma decay mode of the Higgs boson and for new high-mass resonances in pppp collisions at s=13\sqrt{s} = 13 TeV with the ATLAS detector

International audienceThis article presents searches for the Zγ decay of the Higgs boson and for narrow high-mass resonances decaying to Zγ, exploiting Z boson decays to pairs of electrons or muons. The data analysis uses 36.1 fb$^{−1}$ of pp collisions at $\sqrt{s}=13$ recorded by the ATLAS detector at the CERN Large Hadron Collider. The data are found to be consistent with the expected Standard Model background. The observed (expected — assuming Standard Model pp → H → Zγ production and decay) upper limit on the production cross section times the branching ratio for pp → H → Zγ is 6.6. (5.2) times the Standard Model prediction at the 95% confidence level for a Higgs boson mass of 125.09 GeV. In addition, upper limits are set on the production cross section times the branching ratio as a function of the mass of a narrow resonance between 250 GeV and 2.4 TeV, assuming spin-0 resonances produced via gluon-gluon fusion, and spin-2 resonances produced via gluon-gluon or quark-antiquark initial states. For high-mass spin-0 resonances, the observed (expected) limits vary between 88 fb (61 fb) and 2.8 fb (2.7 fb) for the mass range from 250 GeV to 2.4 TeV at the 95% confidence level

Search for direct top squark pair production in final states with two leptons in s=13\sqrt{s} = 13 TeV pppp collisions with the ATLAS detector

International audienceThe results of a search for direct pair production of top squarks in events with two opposite-charge leptons (electrons or muons) are reported, using $36.1~\hbox {fb}^{-1}$ of integrated luminosity from proton–proton collisions at $\sqrt{s}=13$ TeV collected by the ATLAS detector at the Large Hadron Collider. To cover a range of mass differences between the top squark $\tilde{t}$ and lighter supersymmetric particles, four possible decay modes of the top squark are targeted with dedicated selections: the decay $\tilde{t} \rightarrow b \tilde{\chi }_{1}^{\pm }$ into a b-quark and the lightest chargino with $\tilde{\chi }_{1}^{\pm } \rightarrow W \tilde{\chi }_{1}^{0}$ , the decay $\tilde{t} \rightarrow t \tilde{\chi }_{1}^{0}$ into an on-shell top quark and the lightest neutralino, the three-body decay $\tilde{t} \rightarrow b W \tilde{\chi }_{1}^{0}$ and the four-body decay $\tilde{t} \rightarrow b \ell \nu \tilde{\chi }_{1}^{0}$ . No significant excess of events is observed above the Standard Model background for any selection, and limits on top squarks are set as a function of the $\tilde{t}$ and $\tilde{\chi }_{1}^{0}$ masses. The results exclude at 95% confidence level $\tilde{t}$ masses up to about 720 GeV, extending the exclusion region of supersymmetric parameter space covered by previous searches

Measurements of ttˉt\bar{t} differential cross-sections of highly boosted top quarks decaying to all-hadronic final states in pppp collisions at s=13 \sqrt{s}=13\, TeV using the ATLAS detector

Measurements are made of differential cross-sections of highly boosted pair-produced top quarks as a function of top-quark and $t\bar{t}$ system kinematic observables using proton--proton collisions at a center-of-mass energy of $\sqrt{s} = 13$ TeV. The data set corresponds to an integrated luminosity of $36.1$ fb$^{-1}$, recorded in 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider. Events with two large-radius jets in the final state, one with transverse momentum $p_{\rm T} > 500$ GeV and a second with $p_{\rm T}>350$ GeV, are used for the measurement. The top-quark candidates are separated from the multijet background using jet substructure information and association with a $b$-tagged jet. The measured spectra are corrected for detector effects to a particle-level fiducial phase space and a parton-level limited phase space, and are compared to several Monte Carlo simulations by means of calculated $\chi^2$ values. The cross-section for $t\bar{t}$ production in the fiducial phase-space region is $292 \pm 7 \ \rm{(stat)} \pm 76 \rm{(syst)}$ fb, to be compared to the theoretical prediction of $384 \pm 36$ fb